Isometric concept art of a complete...

Isometric concept art of a complete, fully enclosed 360-degree ruined Gothic boss arena, Frost-Bite Keep, with no edges cut off or cropped. Built from deepslate bricks and blackstone, the layout features a clear, arched stone gateway passage on the bottom left, illuminating a snowy path with cyan soul lanterns. The gateway leads seamlessly into a massive circular stone courtyard detailed with patches of blue ice. To the right, an elevated altar is set against a grand, ruined archway. Icicles and frozen waterfalls drape beautifully over the cracked facade. Every angle of the circular perimeter is fully visible and rendered. Clean line art, detailed pixel-art texturing, seamless schematic blueprint layout, dark fantasy RPG asset style.